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Mastigohamites adpressus
(J. de C. Sowerby, 1814 †) (FOSSIL)
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Tricoloceras closteroides
(Etheridge, 1904 †) (FOSSIL)
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Ptychoceras dittleri
Vasicek, 1972 † (FOSSIL)
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Ptychoceras emericanum
d'Orbigny, 1842 † (FOSSIL)
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Ptychoceras emericianum
(A.V.M.D. D'Orbigny, 1842 †) (FOSSIL)
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Ptychoceras forbesianum
F. Stoliczka, 1866 † (FOSSIL)
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Pseudoptychoceras gilberti
Etayo-Serna, 1979 † (FOSSIL)
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Ptychoceras (Diptychoceras) glaber
J.J.F. Whiteaves, 1884 † (FOSSIL)
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Ptychoceras humboldtianum
D.L.G. Karsten, 1858 † (FOSSIL)
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Ptychoceras laeve
Matheron, 1842 † (FOSSIL)
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Ptychoceras laeve hamaimense
Pervinquiere, 1907 † (FOSSIL)
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Ptychoceras (Diptychoceras) laeve
W.M. Gabb, 1869 † (FOSSIL)
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Ptychoceras lashense
Sharikadze, 1975 † (FOSSIL)
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Ptychoceras levigatum
Egoian, 1969 † (FOSSIL)
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Ptychoceras (Diptychoceras) mazapilense
Bose, 1923 † (FOSSIL)
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Ptychoceras minimum
Rouchadze, 1933 † (FOSSIL)
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Ptychoceras (Diptychoceras) nikchitchi
Rouchadze, 1938 † (FOSSIL)
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Ptychoceras obliquesulcatum
Avram, 1976 † (FOSSIL)
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Ptychoceras orbignyi
Reynes, 1876 † (FOSSIL)
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Ptychoceras parvum
Egoian, 1968 † (FOSSIL)
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Ptychoceras poni
Simionescu, 1898 † (FOSSIL)
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Ptychoceras puzosianum
A.V.M.D. D'Orbigny, 1842 † (FOSSIL)
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Ptychoceras renngarteni
Egoian, 1968 † (FOSSIL)
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Ptychoceras smithi
Woods 1896 † (FOSSIL)
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